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“Welcome! Please remove your shoes and leave them under the benches to your right, and then put on this cloak.”Had I stumbled into Hogwarts? A cult ritual? No, I was just one of hundreds of curious concert-goers filing into the Upper East Side’s Park Avenue Armory for a rare musical event.

Dans la salle omnisport d'un lycée hôtelier, le Printemps des Arts de Monte-Carlo a placé ses haut-parleurs pour une expérience singulière et mémorable : Oktophonie de Karlheinz Stockhausen.